9spd Dura-Ace shifter stuck=broken?
Well, I decided to dust of a bike I haven't used in some years, to give to my niece. After cleaning it up, I thought I would check/replace cables, so I put it in the stand and started shifting up and down the gears- when the right shifter stuck. I can't get it to shift down or shift up. Well, should I soak it? Could it break so easily? I did search for shifter issues and read a bit about spraying it out then blowing it out, but is it possible to open it up to really clean it or is it toast if it does not un-stick itself. I mean, what do people do if a cable frays inside and binds it up and you can't get the cable out because you can't shift to a point where you can remove the cable. The inner lever only moves a small amount and does not click, the outer lever moves easily but does nothing.
Okay, the best trick I've found, short of disassembling and cleaning, is to spray a bunch of lubricant into the bowels of the shifter and let it sit for a few minutes. Sometimes it works to free up extra-sticky grease that is preventing the springs and ratchets and such from moving as they should. If a cable frays inside the shifter you can usually force it out the way it loads with another short piece of cable or by worrying at it with various tools, I've never found that to be more than a five minute problem. Sometimes the broken spears of cable get lost in there, but that's another story entirely.
I would shoot lots of WD40 into the shifter. This often works.
Do not try to disassemble the shifter, it's nearly impossible to get back together and parts aren't available.
Also look for a loose or missing screw on the underside of the shifter.
If the cable has been slacked inside the shifter, the bead inside the shifter can become unseated and come out of its "cup". I discovered while setting 105's (Dura-Ace may be simular), the bead can come "unhooked" and travel outside of the ratcheting mechanism ... providing absolutely now cable travel for shifting. No amount of spraying will fix this. Ensure that the bead is properly seated first and then spray away if it is.
Originally Posted by Tzvia
Never, EVER shift a Shimano brifter while stationary. The 1st-generation 8-spd shifters would instantly break if you did this. We got in over 100 RMAs a month at our shop for this problem. Always make sure the cranks are moving at least 50rpms when you shift so the derailleur and chain can move easily.
Ok, I took it off the bike and held it over a cup and sprayed wd-40 through it. I then let it sit a few minutes, then followed it up with a spray of Slick-50 lube. Let that sit a few minutes, then spayed it out again with WD-40, shaking it in all directions to get it everywhere inside. let it drip 'dry' for about 5 minutes, then took the cable end, and locked it in a vise so I could provide some tension. I then began to work the inner lever, which finally began to click out the shifts. So I went up, down several minutes, then finally I clicked it down and removed the cable. Yay! So I put some new cables and other bits on order (new 12-27 cassette as my niece would not like my 'corncob'). Next I am going to clean up the other shifter. I hope she likes the bike after all this. Thanks for the tips folks!